The Meeting With His Sister:
The following story was related by Rav Nosson Gestetner zt‑l (quoted in Chodesh B’Chadsho 5766, page 1):
In the years of ‘Tach V’Tat’ (5408-5409) many pogroms took place against the Jews and the Shach had to flee from the marauding bands of murderers. The Shach’s sister also fled from her father’s home, and she made her way to the home of a wealthy man who took her in as a servant in his house. When the Shach came to this city, he also stayed in this man’s home, without knowing that sister was there, and he sat and learned all day in a loud voice, as he was accustomed to do.
As he learned, the wealthy man heard the servant girl crying in a neighboring room. When he asked her what was wrong, she said that her brother, Rav Shabsi, had learned in her parents’ home, learning with a sweet voice. When she heard this masmid learning, it reminded her of her brother, and how she had no idea what happened to him. After she described her brother to her boss, he realized that he was, in fact, the masmid learning in his house.
At that time, the Shach blessed his sister to merit a family of offspring that would be great in Torah and mitzvos and who would light up the world with their Torah. Several years later, she married Rav Yitzchok zt‑l, and her sons included Rav Meir Eisenstadt zy‑a, author of Shu’t Panim Me’iros.